Randomized Controlled Clinical Trial Comparing Screw-Retained Monolithic Zirconia Implant Crowns on Standardized...

Area of Science:

• Dental Implantology
• Prosthodontics
• Biomaterials Science

Background:

• Implant-supported single crowns are crucial for restoring missing posterior teeth.
• Monolithic zirconia offers a high-strength, esthetic restorative material.
• Titanium abutments, standardized or customized, provide the interface between implant and crown.

Purpose of the Study:

• To compare the 3-year clinical outcomes of implant-supported monolithic zirconia single crowns.
• To evaluate crowns placed on standardized titanium bases versus customized titanium abutments.

Main Methods:

• A randomized controlled trial involving 60 patients requiring posterior implant crowns.
• Patients were allocated to either Ti-Base (standardized) or Custom (customized) abutment groups.
• Outcomes assessed included marginal bone level changes, survival, biological/technical complications, and patient-reported outcomes over 3 years.

Main Results:

• No implant crown losses were reported at 3 years.
• Both groups showed similar marginal bone level changes and biological outcomes.
• High patient satisfaction was reported, with one minor chipping complication in the Ti-Base group.

Conclusions:

• Monolithic zirconia single crowns on both standardized and customized titanium abutments are a viable treatment option.
• These restorations demonstrate stable marginal bone levels and high survival rates over 3 years.
• Both treatment modalities achieve high patient satisfaction with minimal complications.